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Action:
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Gets the start parameter of an edge or curve.
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Filename:
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kern/kern_scm/crv_scm.cxx
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Syntax:
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(curve:start-param edge-or-curve)
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Arg Types:
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edge-or-curve
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curve | edge
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Returns:
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real
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Errors:
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EDGE with no
CURVE
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Description:
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This extension returns the normalized parameter value of the start of a curve or edge as a real.
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edge-or-curve specifies an edge or a curve.
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Example:
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; curve:start-param
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; Create circular edge 1.
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(define edge1
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(edge:circular
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(position 0 0 0) 25 0 185))
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;; edge1
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; Find circular edge 1's start parameter.
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(curve:start-param edge1)
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;; 0
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; Create circular edge 2.
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(define edge2
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(edge:circular
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(position 12 15 -3) 45 66 205))
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;; edge2
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; Find circular edge 2's start parameter.
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(curve:start-param edge2)
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;; 1.15191730631626
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